通过Http协议实现文件上传

原文地址为： 通过Http协议实现文件上传

先创建一个测试的JavaBean，定义需要的属性，并生成相应的Set和Get方法。该JavaBean还包含两个构造方法

具体使用请注意阅读注释

import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.InputStream; /** * 上传文件 * FormFile 该JavaBean用来封装上传文件的数据 */ public class FormFile { /* 上传文件的数据 */ private byte[] data; private InputStream inStream; private File file; /* 文件名称 */ private String filname; /* 请求参数名称*/ private String parameterName; /* 内容类型 */ private String contentType = "application/octet-stream"; /* 下面是两个构造函数，主要用于大小不同的文件的上传 */ //该构造器适用于文件小于1M，把数据全部转换为二进制，放到手机内存 public FormFile(String filname, byte[] data, String parameterName, String contentType) { this.data = data; this.filname = filname; this.parameterName = parameterName; if(contentType!=null) this.contentType = contentType; } //大文件用输入、输出流进行边读取边上传 public FormFile(String filname, File file, String parameterName, String contentType) { this.filname = filname; this.parameterName = parameterName; this.file = file; try { this.inStream = new FileInputStream(file); } catch (FileNotFoundException e) { e.printStackTrace(); } if(contentType!=null) this.contentType = contentType; } public File getFile() { return file; } public InputStream getInStream() { return inStream; } public byte[] getData() { return data; } public String getFilname() { return filname; } public void setFilname(String filname) { this.filname = filname; } public String getParameterName() { return parameterName; } public void setParameterName(String parameterName) { this.parameterName = parameterName; } public String getContentType() { return contentType; } public void setContentType(String contentType) { this.contentType = contentType; } }

下面这个类，是利用Http协议上传的工具类

import java.io.BufferedReader; import java.io.ByteArrayOutputStream; import java.io.DataOutputStream; import java.io.InputStream; import java.io.InputStreamReader; import java.io.OutputStream; import java.net.HttpURLConnection; import java.net.InetAddress; import java.net.Socket; import java.net.URL; import java.net.URLEncoder; import java.util.ArrayList; import java.util.List; import java.util.Map; import org.apache.http.HttpResponse; import org.apache.http.NameValuePair; import org.apache.http.client.HttpClient; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.HttpPost; import org.apache.http.impl.client.DefaultHttpClient; import org.apache.http.message.BasicNameValuePair; /** * 通过Http协议上传文件，适用于2M大小以内的文件，如果是视频等大文件应采用其他方法 * 如果上传文本内容，可直接使用Post提交，该类主要是用于上传小文件 */ public class SocketHttpRequester { /** * 发送xml数据 * @param path 请求地址 * @param xml xml数据 * @param encoding 编码 * @return * @throws Exception */ public static byte[] postXml(String path, String xml, String encoding) throws Exception{ byte[] data = xml.getBytes(encoding); URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection)url.openConnection(); conn.setRequestMethod("POST"); conn.setDoOutput(true); conn.setRequestProperty("Content-Type", "text/xml; charset="+ encoding); conn.setRequestProperty("Content-Length", String.valueOf(data.length)); conn.setConnectTimeout(5 * 1000); OutputStream outStream = conn.getOutputStream(); outStream.write(data); outStream.flush(); outStream.close(); if(conn.getResponseCode()==200){ return readStream(conn.getInputStream()); } return null; } /** * 直接通过HTTP协议提交数据到服务器,实现如下面表单提交功能: * <FORM METHOD=POST ACTION="http://192.168.0.200:8080/ssi/fileload/test.do" enctype="multipart/form-data"> <INPUT TYPE="text" NAME="name"> <INPUT TYPE="text" NAME="id"> <input type="file" name="imagefile"/> <input type="file" name="zip"/> </FORM> * @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080这样的路径测试) * @param params 请求参数 key为参数名,value为参数值 * @param file 上传文件 */ public static boolean post(String path, Map<String, String> params, FormFile[] files) throws Exception{ final String BOUNDARY = "---------------------------7da2137580612"; //数据分隔线 final String endline = "--" + BOUNDARY + "--/r/n";//数据结束标志 int fileDataLength = 0; for(FormFile uploadFile : files){//得到文件类型数据的总长度 StringBuilder fileExplain = new StringBuilder(); fileExplain.append("--"); fileExplain.append(BOUNDARY); fileExplain.append("/r/n"); fileExplain.append("Content-Disposition: form-data;name=/""+ uploadFile.getParameterName()+"/";filename=/""+ uploadFile.getFilname() + "/"/r/n"); fileExplain.append("Content-Type: "+ uploadFile.getContentType()+"/r/n/r/n"); fileExplain.append("/r/n"); fileDataLength += fileExplain.length(); if(uploadFile.getInStream()!=null){ fileDataLength += uploadFile.getFile().length(); }else{ fileDataLength += uploadFile.getData().length; } } StringBuilder textEntity = new StringBuilder(); for (Map.Entry<String, String> entry : params.entrySet()) {//构造文本类型参数的实体数据 textEntity.append("--"); textEntity.append(BOUNDARY); textEntity.append("/r/n"); textEntity.append("Content-Disposition: form-data; name=/""+ entry.getKey() + "/"/r/n/r/n"); textEntity.append(entry.getValue()); textEntity.append("/r/n"); } //计算传输给服务器的实体数据总长度 endline（最后的结束线） int dataLength = textEntity.toString().getBytes().length + fileDataLength + endline.getBytes().length; URL url = new URL(path); //得到端口号，如果是-1 就用80，否则取得端口号 int port = url.getPort()==-1 ? 80 : url.getPort(); //创建一个Socket，链接到服务器的某一个端口，如80端口 Socket socket = new Socket(InetAddress.getByName(url.getHost()), port); //数据由Android应用传到服务器，所以构建输出流 OutputStream outStream = socket.getOutputStream(); //下面完成HTTP请求头的发送 String requestmethod = "POST "+ url.getPath()+" HTTP/1.1/r/n"; outStream.write(requestmethod.getBytes()); //完成第二个协议头的数据，可省略 String accept = "Accept: image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*/r/n"; outStream.write(accept.getBytes()); String language = "Accept-Language: zh-CN/r/n"; outStream.write(language.getBytes()); String contenttype = "Content-Type: multipart/form-data; boundary="+ BOUNDARY+ "/r/n"; outStream.write(contenttype.getBytes()); //内容的长度 String contentlength = "Content-Length: "+ dataLength + "/r/n"; outStream.write(contentlength.getBytes()); //Connection请求头 String alive = "Connection: Keep-Alive/r/n"; outStream.write(alive.getBytes()); //Host请求头，末尾"/r/n" 是回车换行符 String host = "Host: "+ url.getHost() +":"+ port +"/r/n"; outStream.write(host.getBytes()); //写完HTTP请求头后根据HTTP协议再写一个回车换行 outStream.write("/r/n".getBytes()); //把所有"文本"类型的实体数据发送出来 outStream.write(textEntity.toString().getBytes()); //把所有"文件"类型的实体数据发送出来 for(FormFile uploadFile : files){ StringBuilder fileEntity = new StringBuilder(); //分割线前面多了两个--符号，加进来，都是从http协议参考过来的 fileEntity.append("--"); fileEntity.append(BOUNDARY); //回车换行符 fileEntity.append("/r/n"); fileEntity.append("Content-Disposition: form-data;name=/""+ uploadFile.getParameterName()+"/";filename=/""+ uploadFile.getFilname() + "/"/r/n"); fileEntity.append("Content-Type: "+ uploadFile.getContentType()+"/r/n/r/n"); outStream.write(fileEntity.toString().getBytes()); //先判断文件有没有输入流，以便确定调用哪个构造方法（该JavaBean里有两个构造方法） if(uploadFile.getInStream()!=null){ byte[] buffer = new byte[1024]; int len = 0; while((len = uploadFile.getInStream().read(buffer, 0, 1024))!=-1){ outStream.write(buffer, 0, len); } uploadFile.getInStream().close(); }else{ //否则代表是以二进制数据传进来的，调用下面的处理方法 outStream.write(uploadFile.getData(), 0, uploadFile.getData().length); } outStream.write("/r/n".getBytes()); } //下面发送数据结束标志，表示数据已经结束，此时服务器会给客户端返回一个响应信息 outStream.write(endline.getBytes()); //从服务端读取响应状态，所以是InputStream BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream())); //返回的信息，第一行就包含状态 if(reader.readLine().indexOf("200")==-1){//读取web服务器返回的数据，判断请求码是否为200，如果不是200，代表请求失败 return false; } outStream.flush(); outStream.close(); reader.close(); socket.close(); return true; } /** * 提交数据到服务器 * @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080这样的路径测试) * @param params 请求参数 key为参数名,value为参数值 * @param file 上传文件 */ public static boolean post(String path, Map<String, String> params, FormFile file) throws Exception{ return post(path, params, new FormFile[]{file}); } /** * 提交数据到服务器 * @param path 上传路径(注：避免使用localhost或127.0.0.1这样的路径测试，因为它会指向手机模拟器，你可以使用http://www.itcast.cn或http://192.168.1.10:8080这样的路径测试) * @param params 请求参数 key为参数名,value为参数值 * @param encode 编码 */ public static byte[] postFromHttpClient(String path, Map<String, String> params, String encode) throws Exception{ List<NameValuePair> formparams = new ArrayList<NameValuePair>();//用于存放请求参数 for(Map.Entry<String, String> entry : params.entrySet()){ formparams.add(new BasicNameValuePair(entry.getKey(), entry.getValue())); } UrlEncodedFormEntity entity = new UrlEncodedFormEntity(formparams, encode); HttpPost httppost = new HttpPost(path); httppost.setEntity(entity); HttpClient httpclient = new DefaultHttpClient();//看作是浏览器 HttpResponse response = httpclient.execute(httppost);//发送post请求 return readStream(response.getEntity().getContent()); } /** * 发送请求 * @param path 请求路径 * @param params 请求参数 key为参数名称 value为参数值 * @param encode 请求参数的编码 */ public static byte[] post(String path, Map<String, String> params, String encode) throws Exception{ //String params = "method=save&name="+ URLEncoder.encode("老毕", "UTF-8")+ "&age=28&";//需要发送的参数 StringBuilder parambuilder = new StringBuilder(""); if(params!=null && !params.isEmpty()){ for(Map.Entry<String, String> entry : params.entrySet()){ parambuilder.append(entry.getKey()).append("=") .append(URLEncoder.encode(entry.getValue(), encode)).append("&"); } parambuilder.deleteCharAt(parambuilder.length()-1); } byte[] data = parambuilder.toString().getBytes(); URL url = new URL(path); HttpURLConnection conn = (HttpURLConnection)url.openConnection(); conn.setDoOutput(true);//允许对外发送请求参数 conn.setUseCaches(false);//不进行缓存 conn.setConnectTimeout(5 * 1000); conn.setRequestMethod("POST"); //下面设置http请求头 conn.setRequestProperty("Accept", "image/gif, image/jpeg, image/pjpeg, image/pjpeg, application/x-shockwave-flash, application/xaml+xml, application/vnd.ms-xpsdocument, application/x-ms-xbap, application/x-ms-application, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */*"); conn.setRequestProperty("Accept-Language", "zh-CN"); conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)"); conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); conn.setRequestProperty("Content-Length", String.valueOf(data.length)); conn.setRequestProperty("Connection", "Keep-Alive"); //发送参数 DataOutputStream outStream = new DataOutputStream(conn.getOutputStream()); outStream.write(data);//把参数发送出去 outStream.flush(); outStream.close(); if(conn.getResponseCode()==200){ return readStream(conn.getInputStream()); } return null; } /** * 读取流 * @param inStream * @return 字节数组 * @throws Exception */ public static byte[] readStream(InputStream inStream) throws Exception{ ByteArrayOutputStream outSteam = new ByteArrayOutputStream(); byte[] buffer = new byte[1024]; int len = -1; while( (len=inStream.read(buffer)) != -1){ outSteam.write(buffer, 0, len); } outSteam.close(); inStream.close(); return outSteam.toByteArray(); } }

调用时可以这样写，仅供参考，这里是通过触发一个Button事件调用：

button.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String title = titleText.getText().toString(); String timelength = timelengthText.getText().toString(); //通过Map构造器传参 Map<String, String> params = new HashMap<String, String>(); params.put("method", "save"); params.put("title", title); params.put("timelength", timelength); try { //取得上传文件的名称 File uploadFile = new File(Environment.getExternalStorageDirectory(), videoText.getText().toString()); //文件上传JavaBean ，通过New调用构造方法（此处是调用第二个构造函数，以输入、输出流上传），audio/mpeg为Mp3文件的内容类型 //如果不知道上传文件的内容类型，可以在IE浏览器上传一个文件测试，在后台观察源码（通过HttpWatch） FormFile formfile = new FormFile("02.mp3", uploadFile, "video", "audio/mpeg"); SocketHttpRequester.post("http://192.168.1.100:8080/videoweb/video/manage.do", params, formfile); Toast.makeText(MainActivity.this, R.string.success, 1).show(); } catch (Exception e) { Toast.makeText(MainActivity.this, R.string.error, 1).show(); Log.e(TAG, e.toString()); } } });

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